<!doctype HTML>
<div id=target style="width: 200px; height: 200px; overflow-y: scroll; border-radius: 5px; isolation: isolate">
  <div style="width: 100px; height: 100px; background: lightblue;  will-change: transform;"></div>
  <div style="width: 100px; height: 300px;"></div>
</div>
<script>
if (window.testRunner)
  window.testRunner.waitUntilDone();
onload = function() {
  target.scrollBy(0, 50);
  if (window.testRunner)
    window.testRunner.notifyDone();
}
</script>
